MDCAT Biology MCQ #662

A molecular biologist is modeling a DNA nucleotide. At which carbon position of the pentose sugar should the phosphate group be attached?

MDCAT Biology MCQ #662

  1. Question 1

    Q1. A molecular biologist is modeling a DNA nucleotide. At which carbon position of the pentose sugar should the phosphate group be attached?

    • A) Carbon-5
    • B) Carbon-3
    • C) Carbon-1
    • D) Carbon-2

    Answer: Carbon-5

    Explanation: In a nucleotide, the phosphoric acid is always attached to the carbon-5 of the pentose sugar.